GE 8112-DI-AC 8-channel DI, 115Vac non-isolated, module powered

Tradeoff of Resolution for Module Throughput

The module offers ~15 bit effective resolution on all

channels. The module also offers several analog-to

digital conversion options that allow higher speed

signals to be selectively read more quickly on a

channel-by-channel basis.

Note however, that at the highest speeds, uncertainty

in value of the lower bits will increase, resulting in

reduced resolution. The following table indicates the

approximate effect on resolution of higher speeds.

PAC8000 Process Controllers

The PAC8000 Controllers include a Process Controller featuring distributed control system (DCS)- style function block programming; 

a Logic Controller featuring 61131-style programmable logic controller (PLC) programming; 

and a Hybrid Controller that provides both programming styles in the same unit. 

A SIL 2 SafetyNet Controller and an RTU Controller are also available, which provides DNP3 communication for the PAC8000 family. 

The 8521-EB-MT Bus Interface Module, for remote I/O applications, shares the same hardware as the controllers listed below. 

It can be upgraded from a bus interface module to a full controller by firmware download, which is especially useful in ongoing legacy system replacement. 

• 8 isolated, universal, input channels

• Configurable on a channel by channel basis: 4-20mA, THC, RTD, resistance &voltage

• 250V ac rms channel to channel isolation

• Thermocouple types B, E, J, K, N, R, S, T, W3. W5. Russian K, Russian L

• RTD Types Pt100. jPt100. Pt200. Pt500.Ni120. Cu10

• Volt input types ±120mV, 0-1V, 0-5V,1-5V, 0-10V, ±10V

• 2 or 3-wire RTDs

• 2 or 4-wire transmitters

• Non-incendive field circuits

• 24 V dc bussed field power required

CONFIGURABLE PARAMETERS

Sensor type

• User selectable

Alarms

• High-high, high, low and low-low

Alarm deadband (hysteresis)

• User defined value

Input dead zone

• User defined value

Channel status

• Active / inactive

Filter/sample rates

• User selectable

GENERAL SPECIFICATIONS

Common mode rejection (using 50/60Hz filter)

• > 120 dB @ 50/60 Hz

Series mode rejection (using 50/60Hz filter)

• > 65 dB @ 50/60 Hz

Maximum input voltage (except current I/P)

• ± 25V

Common mode voltage between channels

• 250 V ac rms

Isolation

• Channel to channel – 250 V ac rms

• Any channel to Railbus – 250 V ac rms

• Any channel to Bussed Field Power – 250 V ac rms

• Railbus to Bussed Field Power – 150 V ac rms

Input filter response

• Time constant 4 ms

Input impedance

• > 1 M ohm

Data Format

• 0 to 65535 corresponds to selected span